Manmadhan

An auditor by profession who leads a double life as the serial killer Manmadhan. He seduces victims, renders them unconscious with chloroform, and burns their bodies, storing ashes in name-tagged bottles. A nosebleed accompanies his intended killings, a recurring motif tied to his inner turmoil. The twist reveals his younger twin Raj is the true killer, and Kumar adopts Raj’s death as a cover while continuing his own vengeance-driven killings under the Manmadhan alias.

Chennai’s new assistant commissioner who leads the investigation into the missing girls and the Manmadhan murders. He tracks patterns, connects victims to the suspect, and pushes the case toward a confrontation with the killer. Deva’s persistence drives the pursuit of truth as the mystery deepens and loyalties are tested.

A music-loving, naive woman who studies at the same college and befriends Madhan. She witnesses a troubling vision that unsettles her but eventually sees the killer’s kinder side. Mythili informs Deva about Madhan’s whereabouts, and later contemplates Kumar’s emotional openness, hoping for a possible romantic connection. Her innocence and sincerity anchor the story’s emotional core.

The younger twin who is innocent and sentimental, he forms a close bond with Vaishnavi and is romantically attracted to her. After discovering the truth about Vaishnavi and Seenu, he kills them in a fit of disillusionment. He later meets Kumar, confesses his regrets, and dies by suicide, a turning point that Kumar secretly uses to justify his own actions as Manmadhan.

Raj’s classmate who is involved in a forbidden relationship with Seenu. Her deception is uncovered, prompting conflict and ultimately contributing to Raj’s decision to kill her and Seenu. Her arc underscores themes of trust, manipulation, and the consequences of infidelity.

The twins’ maternal uncle, a pivotal family figure who provides a stark backdrop to the brothers’ upbringing. His presence grounds the brothers’ past and adds a layer of loyalty and mischief to the family dynamics.

Raj’s hostel roommate and close friend who belongs to Raj’s inner circle. He represents the social sphere around Raj and helps illustrate the environment in which Raj’s feelings and decisions unfold.

A victim in one of the killer’s early spree scenes, symbolizing the danger of the killer’s predatory pattern. Her death marks a turning point that draws Deva deeper into the case.